USER MANUAL – RTU-LP-ST
28
40 0000
22
TOT3 Reset/Overflow
(0000)
80 0000
23
TOT4 Reset/Overflow
(0000)
100 0000
24
SMS 0 (event SMS0)
400 0000
26
Timer Seconds (count of
seconds)
2000 0000
29
Timer Day
4000 0000
30
RTU LOW BATTERY
8000 0000
31
RTU RESET
8.1.
Events log data buffering
If there is a network or FTP server fail, the RTU can buffer not sent data to the internal flash. The RTU will
try for 3 times before return to sleep, when there is a new connection the RTU will continue to send data
from the oldest value.
The first time the RTU will re-connect, only the not sent data will be send.
You must wait the second connection for try to re-align the log with the actual date/time.
9.
MODBUS RTU PROTOCOL
The modbus RTU protocol is available from the RS232 Port.
The communication parameters are:
19200 Baud, 8 data bit, parity None.
The Modbus slave addess is 1.
The modbus function code supported are:
03 Read Holding Registers (Max 16 registers)
04 Read Input Registers (Max 16 registers at a time)
20 Read File Record (Read of a File record)
06 Write Single Register
